editor: finalizing exercise.order drag & drop mechanism

[fnpeditor.git] / src / smartxml / smartxml.js

diff --git a/src/smartxml/smartxml.js b/src/smartxml/smartxml.js
index 502eda6..c158bac 100644 (file)
--- a/src/smartxml/smartxml.js
+++ b/src/smartxml/smartxml.js
@@ -12,17 +12,28 @@ define([
 /* globals Node */
 
 
+var privateKey = '_smartxml';
+
 var DocumentNode = function(nativeNode, document) {
     if(!document) {
         throw new Error('undefined document for a node');
     }
     this.document = document;
+    this.object = {};
     this._setNativeNode(nativeNode);
 
 };
 
 $.extend(DocumentNode.prototype, {
 
+    getProperty: function(propName) {
+        var toret = this.object[propName];
+        if(toret && _.isFunction(toret)) {
+            toret = toret.call(this);
+        }
+        return toret;
+    },
+
     transform: function(Transformation, args) {
         var transformation = new Transformation(this.document, this, args);
         return this.document.transform(transformation);
@@ -39,7 +50,7 @@ $.extend(DocumentNode.prototype, {
         clone.find('*').addBack().each(function() {
             var el = this,
                 clonedData = $(this).data();
-
+            $(el).removeData(privateKey);
             _.pairs(clonedData).forEach(function(pair) {
                 var key = pair[0],
                     value = pair[1];
@@ -123,21 +134,26 @@ $.extend(DocumentNode.prototype, {
     },
 
     isSurroundedByTextNodes: function() {
-        var prev = this.prev(),
-            next = this.next();
-        return prev && (prev.nodeType === Node.TEXT_NODE) && next && (next.nodeType === Node.TEXT_NODE);
+        return this.isPrecededByTextNode() && this.isFollowedByTextNode();
+    },
+
+    isPrecededByTextNode: function() {
+        var prev = this.prev();
+        return prev && prev.nodeType === Node.TEXT_NODE;
+    },
+
+    isFollowedByTextNode: function() {
+        var next = this.next();
+        return next && next.nodeType === Node.TEXT_NODE;
     },
 
     triggerChangeEvent: function(type, metaData, origParent, nodeWasContained) {
         var node = (metaData && metaData.node) ? metaData.node : this,
             event = new events.ChangeEvent(type, $.extend({node: node}, metaData || {}));
         if(type === 'nodeDetached' || this.document.containsNode(event.meta.node)) {
-            if(type === 'nodeMoved') {
-                event.meta.parent = origParent;
-            }
             this.document.trigger('change', event);
         }
-        if((type === 'nodeAdded' || type === 'nodeMoved') && !this.document.containsNode(this) && nodeWasContained) {
+        if(type === 'nodeAdded' && !this.document.containsNode(this) && nodeWasContained) {
              event = new events.ChangeEvent('nodeDetached', {node: node, parent: origParent});
              this.document.trigger('change', event);
         }
@@ -148,10 +164,14 @@ $.extend(DocumentNode.prototype, {
     },
 
     getIndex: function() {
+        var parent;
+
         if(this.isRoot()) {
             return 0;
         }
-        return this.parent().indexOf(this);
+
+        parent = this.parent();
+        return parent ? parent.indexOf(this) : undefined;
     },
 
     getNearestElementNode: function() {
@@ -162,18 +182,23 @@ $.extend(DocumentNode.prototype, {
 
 var ElementNode = function(nativeNode, document) {
     DocumentNode.call(this, nativeNode, document);
+    $(nativeNode).data(privateKey, {node: this});
 };
 ElementNode.prototype = Object.create(DocumentNode.prototype);
 
 $.extend(ElementNode.prototype, {
     nodeType: Node.ELEMENT_NODE,
 
-    setData: function(key, value) {
-        if(value !== undefined) {
-            this._$.data(key, value);
+    setData: function(arg1, arg2) {
+        if(arguments.length === 2) {
+            if(_.isUndefined(arg2)) {
+                this._$.removeData(arg1);
+            } else {
+                this._$.data(arg1, arg2);
+            }
         } else {
             this._$.removeData(_.keys(this._$.data()));
-            this._$.data(key);
+            this._$.data(arg1);
         }
     },
 
@@ -181,7 +206,9 @@ $.extend(ElementNode.prototype, {
         if(key) {
             return this._$.data(key);
         }
-        return this._$.data();
+        var toret = _.clone(this._$.data());
+        delete toret[privateKey];
+        return toret;
     },
 
     getTagName: function() {
@@ -223,11 +250,21 @@ $.extend(ElementNode.prototype, {
         return node && (node.nativeNode === this.nativeNode || node._$.parents().index(this._$) !== -1);
     },
 
+    getFirstTextNode: function() {
+        return this._getTextNode('first');
+    },
+
     getLastTextNode: function() {
+        return this._getTextNode('last');
+    },
+
+    _getTextNode: function(which) {
         var contents = this.contents(),
             toret;
-
-        contents.reverse().some(function(node) {
+        if(which === 'last') {
+            contents = contents.reverse();
+        }
+        contents.some(function(node) {
             if(node.nodeType === Node.TEXT_NODE) {
                 toret = node;
                 return true;
@@ -253,12 +290,33 @@ $.extend(ElementNode.prototype, {
 
 var TextNode = function(nativeNode, document) {
     DocumentNode.call(this, nativeNode, document);
+    this._data = Object.create({});
+    nativeNode.__smartxmlTextNodeInstance = this;
 };
 TextNode.prototype = Object.create(DocumentNode.prototype);
 
 $.extend(TextNode.prototype, {
     nodeType: Node.TEXT_NODE,
 
+    setData: function(arg1, arg2) {
+        if(arguments.length === 2) {
+            if(_.isUndefined(arg2)) {
+                delete this._data[arg1];
+            } else {
+                this._data[arg1] = arg2;
+            }
+        } else {
+            this._data = _.extend({}, arg1);
+        }
+    },
+
+    getData: function(key) {
+        if(key) {
+            return this._data[key];
+        }
+        return this._data;
+    },
+
     getText: function() {
         return this.nativeNode.data;
     },
@@ -277,7 +335,7 @@ $.extend(TextNode.prototype, {
 
 var parseXML = function(xml) {
     var toret = $($.trim(xml));
-    if(!toret.length) {
+    if(toret.length !== 1) {
         throw new Error('Unable to parse XML: ' + xml);
     }
     return toret[0];
@@ -330,7 +388,15 @@ $.extend(Document.prototype, Backbone.Events, fragments, {
     TextNodeFactory: TextNode,
 
     createDocumentNode: function(from) {
-        if(!(from instanceof Node)) {
+        var cached;
+
+        if(from instanceof Node) {
+            /* globals Text */
+            cached = from instanceof Text ? from.__smartxmlTextNodeInstance : ($(from).data(privateKey) || {}).node;
+            if(cached instanceof DocumentNode) {
+                return cached;
+            }
+        } else {
             if(typeof from === 'string') {
                 from = parseXML(from);
                 this.normalizeXML(from);
@@ -556,7 +622,6 @@ $.extend(Document.prototype, Backbone.Events, fragments, {
 
             if(transformations.length > 1) {
                 // In case of real transactions we don't want to run undo on all of transformations if we don't have to.
-                stopAt = undefined;
                 transformations.some(function(t, idx) {
                     if(!t.undo && t.getChangeRoot().sameNode(doc.root)) {
                         stopAt = idx;
@@ -644,8 +709,11 @@ $.extend(Document.prototype, Backbone.Events, fragments, {
 
     getNodeByPath: function(path) {
         var toret = this.root;
-        path.forEach(function(idx) {
+        path.some(function(idx) {
             toret = toret.contents()[idx];
+            if(!toret) {
+                return true;
+            }
         });
         return toret;
     },